The synthesis processes for ultradiamond50 and ultradiamond90 particles are briefly outlined. Outlines include starting materials, conditions of reaction (temperature, pressure, and time), and patent citations. Starting materials for ultradiamond90 include ultradiamond50. link to home link to index of topics link to glossary
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  Synthesis of ultradiamond50
Materials
Explosive-containing carbon, with a negative oxygen balance
Gases inert to carbon, containing 0.1 - 6.0 % oxygen by volume
Ultradispersed carbon condensate, 0.01 - 0.15 kilograms per cubic meter
Conditions of reaction
Temperature: 3,500 K (3227 deg. C)
Pressure: over 20 GPa (2,900,000 psi)
Time: 0.1 - 0.5 microseconds
For more information
US Patent 5,861,349


  Synthesis of ultradiamond90
Materials
ultradiamond50
An oxidizing mixture of sulphuric and nitric acids
Conditions of reaction
Temperature: 503 - 578 K (230-305 deg. C)
For more information
Russian Federation Patent 2041165

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